669293244 has 36 divisors (see below), whose sum is σ = 1693635216. Its totient is φ = 222859008.

The previous prime is 669293243. The next prime is 669293267. The reversal of 669293244 is 442392966.

It is a tau number, because it is divible by the number of its divisors (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 669293244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669293243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25932 + ... + 44844.

Almost surely, 2^669293244 is an apocalyptic number.

It is an amenable number.

669293244 is an abundant number, since it is smaller than the sum of its proper divisors (1024341972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669293244 is a wasteful number, since it uses less digits than its factorization.

669293244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19906 (or 19901 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The square root of 669293244 is about 25870.7024257170. The cubic root of 669293244 is about 874.7262246614.

The spelling of 669293244 in words is "six hundred sixty-nine million, two hundred ninety-three thousand, two hundred forty-four".